Journal of Sensor Science and Technology (센서학회지)

The Korean Sensors Society (한국센서학회)
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Enhanced Performance of PVDF Piezoelectric Speaker Using PVDF/ZnO Nanopillar Composites

PVDF/ZnO Nanopillar 복합재료를 이용한 압전필름 스피커의 성능향상

  • Kwak, Jun-Hyuk (Department of Nature-Inspired Nano Convergence System, Korea Institute of Machinery and Materials) ;
  • Hur, Shin (Department of Nature-Inspired Nano Convergence System, Korea Institute of Machinery and Materials)
  • Received : 2016.11.17
  • Accepted : 2016.11.29
  • Published : 2016.11.30
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Abstract

In this study, we fabricated and evaluated the performance of film speaker using PVDF/ZnO NP composite structure. PVDF piezoelectric films were fabricated and characterized by XRD and SEM. ZnO nanopillars were prepared by hydrothermal synthesis on prepared PVDF piezoelectric films. We analyzed and tested the acoustic signal characteristics of the piezoelectric film. In order to fabricate an acoustic structure with a wide frequency range from low to high frequency, we have fabricated various types of film speakers and investigated the frequency characteristics. As a result, the fundamental piezoelectric properties of PVDF show that the piezoelectric constant due to ZnO NP increases. And the overall acoustic signal level is also increased by 10% or more. We investigated frequency generation from 500 Hz to 10 KHz using different sizes with PVDF/ZnO NP composite film speaker.

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References

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